Add timezone-collection mega-component

Needs to be split into smaller components, and tested

app/components/timezone-collection.js

@@ -0,0 +1,57 @@
+import Ember from 'ember';
+import TimezoneColumn from 'stz/models/timezone-column';
+
+const secondsInHour = 3600;
+
+// FIXME: all these functions should be in utils so that they're testable
+
+function calculateTimezoneStart(offset) {
+  // Finds the start of the hour window for the timezone containing offset.
+  // 7200 -> 7200
+  // 9000 -> 7200
+  // -7200 -> -7200
+  // -9000 -> -10800
+  return Math.floor(offset / secondsInHour) * secondsInHour;
+}
+
+function calculateTimezoneStop(offset) {
+  // Finds the end of the hour window for the timezone containing offset.
+  // 7200 -> 7200
+  // 9000 -> 10800
+  // -7200 -> -7200
+  // -9000 -> -7200
+  return Math.ceil(offset / secondsInHour) * secondsInHour;
+}
+
+function nextTimezone(start) {
+  return start + secondsInHour;
+}
+
+export default Ember.Component.extend({
+  classNames: ['timezone-container'],
+
+  users: Ember.computed.alias('model'),
+  offsets: Ember.computed.mapBy('users', 'tzOffset'),
+  earliest: Ember.computed.min('offsets'),
+  latest: Ember.computed.max('offsets'),
+
+  columns: Ember.computed('users.@each.tzOffset', function() {
+    let users = this.get('model');
+    let start = calculateTimezoneStart(this.get('earliest'));
+    let stop = calculateTimezoneStop(this.get('latest'));
+    let columns = Ember.A();
+
+    for (let tz = start; tz < stop; tz = nextTimezone(tz)) {
+      let matches = users.filter(function(user) {
+        let offset = user.get('tzOffset');
+        return offset >= tz && offset < nextTimezone(tz);
+      });
+      columns.push(TimezoneColumn.create({
+        timezoneStart: tz,
+        users: matches
+      }));
+    }
+
+    return columns;
+  })
+});

app/controllers/index.js

@@ -0,0 +1,4 @@
+import Ember from 'ember';
+
+export default Ember.Controller.extend({
+});

app/models/timezone-column.js

@@ -0,0 +1,7 @@
+import Ember from 'ember';
+
+export default Ember.Object.extend({
+  timezoneStart: null,
+  users: null,
+  empty: Ember.computed.empty('users')
+});

app/templates/components/timezone-collection.hbs

@@ -0,0 +1,17 @@
+{{#each columns as |column|}}
+  <!-- FIXME: column should be a component -->
+  <div class="timezone-column {{if column.empty 'timezone-column--empty'}}">
+    <!-- FIXME: users should be grouped by timezone (asc) -->
+    <!-- FIXME: timezone should be displayed -->
+    <!-- FIXME: current time should be displayed -->
+    <!-- FIXME: item should be a component -->
+    {{#each column.users as |user|}}
+      <div class="timezone-column__item">
+        <div><img src={{user.image_72}}></div>
+        <div>{{user.realName}}</div>
+        <div>{{user.tz}}</div>
+        <div>{{user.tzOffset}}</div>
+      </div>
+    {{/each}}
+  </div>
+{{/each}}

app/templates/index.hbs

@@ -1,26 +1 @@
-<h1>{{model.length}} Users</h1>
-
-<table>
-  <thead>
-    <tr>
-      <th>Avatar</th>
-      <th>User</th>
-      <th>Real name</th>
-      <th>Timezone</th>
-      <th>Timezone Label</th>
-      <th>Timezone Offset</th>
-    </tr>
-  </thead>
-  <tbody>
-    {{#each model as |user|}}
-    <tr>
-      <td><img src={{user.image_72}}></td>
-      <td>{{user.username}}</td>
-      <td>{{user.realName}}</td>
-      <td>{{user.tz}}</td>
-      <td>{{user.tzLabel}}</td>
-      <td>{{user.tzOffset}}</td>
-    </tr>
-    {{/each}}
-  </tbody>
-</table>
+{{timezone-collection users=model}}

tests/unit/components/timezone-collection-test.js

@@ -0,0 +1,19 @@
+import { moduleForComponent, test } from 'ember-qunit';
+
+moduleForComponent('timezone-collection', 'Unit | Component | timezone collection', {
+  // Specify the other units that are required for this test
+  // needs: ['component:foo', 'helper:bar'],
+  unit: true
+});
+
+test('it renders', function(assert) {
+  assert.expect(2);
+
+  // Creates the component instance
+  var component = this.subject();
+  assert.equal(component._state, 'preRender');
+
+  // Renders the component to the page
+  this.render();
+  assert.equal(component._state, 'inDOM');
+});